Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
the challenging ones
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the challenging ones" is correct and usable in written English.
It can be used to refer to specific tasks, problems, or individuals that are difficult or require significant effort to deal with. Example: "In our project, we need to focus on the challenging ones to ensure we overcome the toughest obstacles."
✓ Grammatically correct
News & Media
Wiki
Science
Alternative expressions(6)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
11 human-written examples
Get the questions you know out of the way first so that you'll have more time to focus on the challenging ones.
Wiki
Who were the challenging ones? A. I think Gary Barnett of Extell Development was very challenging.
News & Media
"We've got four months ahead, and they're the challenging ones.
News & Media
3) Seize opportunities – especially the challenging ones Take every single opportunity offered to you.
News & Media
Always dressed immaculately and often puffing a big Cuban cigar, Dr. Lukash welcomed the goriest cases but preferred the challenging ones.
News & Media
This problem is amongst the challenging ones facing law enforcement as it is difficult to identify victims and counter traffickers.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
49 human-written examples
And the question of why that blind spot exists is the challenging one," says Lewis-McCoy.
News & Media
The design of new advanced gasification reactor concept still has to be pursued in order to achieve the challenging one-step production of a high quality syngas from biomass gasification.
With regard to the differential diagnosis, endocrine pancreatic tumors are the most challenging ones, as the other primary pancreatic tumors tend to be hypovascular.
Science
According to Kangas et al. (2015), problems with multiple dimensions, including uncertainty, are among the most challenging ones and the uncertainty may reside in any of the factors (e.g. in consequences and preferences) in decision (or impact) analysis.
Science
Find the ones that fit with your physique naturally and perfect the basic instructions before moving on to the more challenging ones.
Wiki
Expert writing Tips
Best practice
When using "the challenging ones", ensure the context is clear to the audience. Specify what makes them challenging, or who is being challenged, to provide a clearer understanding.
Common error
Avoid using "the challenging ones" without any specific context. Ensure your audience knows what specifically is being referred to, so the phrase doesn't become vague or meaningless.
Source & Trust
80%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the challenging ones" functions as a noun phrase, where 'challenging' acts as an adjective modifying 'ones', which stands in for previously specified nouns (e.g., tasks, problems, questions). Ludwig AI confirms its grammatical correctness.
Frequent in
News & Media
40%
Wiki
20%
Science
20%
Less common in
Formal & Business
10%
Academia
5%
Reference
5%
Ludwig's WRAP-UP
In summary, "the challenging ones" is a grammatically sound and frequently employed phrase used to denote entities characterized by difficulty or demanding requirements. Ludwig AI's analysis affirms its proper usage across varied contexts, from academic discussions to news reporting. This phrase's prevalence is noted in News & Media, Wiki, and Science, making it a versatile choice for describing formidable tasks or situations. While the phrase is widely understood, clarity is crucial; make sure the context clearly identifies what "ones" refers to, preventing ambiguity and ensuring effective communication.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the difficult tasks
Replaces "challenging" with "difficult", focusing on the level of effort required.
the demanding issues
Substitutes "challenging" with "demanding", highlighting the high requirements involved.
the complex problems
Replaces "challenging" with "complex", emphasizing the intricate nature of the problem.
the tough cases
Uses "tough" instead of "challenging", suitable for situations involving resilience.
the intricate situations
Changes both "challenging" and "ones" to emphasize detail.
the formidable obstacles
Emphasizes the difficulty in overcoming the "challenging ones".
the uphill battles
Introduces a metaphor, highlighting effort and resistance.
the testing experiences
Focuses on the evaluation or proving aspect of "challenging ones".
the rigorous assignments
Emphasizes thoroughness and demand for precision.
the taxing endeavors
Highlights the depleting nature of energy and resources.
FAQs
How can I use "the challenging ones" in a sentence?
Use "the challenging ones" to refer to tasks, problems, or individuals that require significant effort or skill. For example, "Among all projects, we should prioritize "the challenging ones".".
What phrases are similar to "the challenging ones"?
You can use alternatives like "the difficult tasks", "the demanding issues", or "the complex problems" depending on the context.
Is it better to say "the challenging ones" or "challenging tasks"?
Both phrases are grammatically correct, but ""the challenging ones"" is generally used when you have already established what 'ones' refers to. "Challenging tasks" is more direct when introducing the concept.
When is it appropriate to use "the challenging ones" in writing?
It is appropriate when referring back to previously mentioned tasks, situations, or problems known for their difficulty. For instance, "We've addressed the simpler issues; now let's focus on "the challenging ones".".
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
80%
Authority and reliability
4.5/5
Expert rating
Real-world application tested